Were the relic DM density to be entirely
made up of axions,
an oscillating nEDM signal \(d_n (t)\)  could be at reach [1]},
\(d_n (t) = g_{d}\,\frac{\sqrt{2\rho _{\text{DM, local}}}}{m_a} \cos (m_a\,t) \, ,\) 
